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    Setting Up a PAA Configuration Job
    • 19 Dec 2023
    • 9 Minutes to read
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    Contents

    Setting Up a PAA Configuration Job

    • Updated on 19 Dec 2023
    • 9 Minutes to read
    • Contributors
    • Print
    • Dark
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    • PDF
    Article Summary

    The PAA (Protocol Analysis Application) is a hardware-assisted active-measurement function that computes Layer-2 or Layer 3 (IPv4 UDP and IPv6 UDP) network delay (latency), delay variation (jitter), packet loss and continuity checks.
    Two units with matching settings communicate with each other using measurement samples to collect data and measure system performance. A measurement sample is a packet containing timing and sequence information. When such a packet arrives at its destination, measurements (delay, delay variation and packet loss) can be taken. The PAA operates continuously.

    To set up a PAA job

    1. Access the page Commission ▶ Jobs.

    2. Set all common configuration job settings, as described in "Creating Configuration Jobs in GUI Mode" and in "Creating Configuration Jobs Using Data Sets".

    3. Select PAA in the left pane. The PAA tab is displayed.

    PAA tab
    Setting Up a PAA Configuration Job_1.PNG

    1. Complete all fields in the PAA tab as required. For more information on specific parameters, see the table below.

    2. Use the Add PLUS BUTTON.png button or Duplicate DUPLICATE BUTTON.png button to add PAA settings as required.

    Note: When duplicating a row, always select the row to duplicate before clicking the Duplicate DUPLICATE BUTTON.png button.

    1. Click Apply, then click Close.

    2. Click the Refresh REFRESH BUTTON.png button to refresh the user interface.

    PAA tab (Commission ▶ Jobs)

    ParameterDescription
    EnableActivates this PAA probe for use.
    NameThe name assigned to the PAA probe.
    Update nameChange the name assigned to the PAA probe.
    TypeThe type of probe:
    • Layer-2: The probe operates at Layer 2.
    • UDP: The probe operates using UDP over IPv4.
    • UDP_IPv6: The probe operates using UDP over IPv6.
    Operation modeSpecifies whether a probe generates (Source) PAA samples, collects PAA samples (Sink) or does both operations (Bi-Dir).
    Packet sizeThe size of PAA samples to take.

    Note: The size value indicated here does not include protocol headers (VLAN tags, UDP, IP or Ethernet) or the four FCS bytes.

    Sampling periodThe time period to elapse between each issuing of PAA samples.

    Range: 50–600,000 (steps of one millisecond).

    Local indexThe probe's local identifier.

    Note: To automatically allocate the next sequentially- available local identifier to the PAA instance, enter "0" for the local identifier or simply leave the field blank.

    Peer IndexAllows the device to obtain routing information from the DHCP server.

    The remote peer identifier.

    When 0 is specified, the remote peer identifier is discovered dynamically based on the probe name in the association phase.

    L2

    ParameterDescription
    Destination MACThe peer MAC address.

    When set to FF:FF:FF:FF:FF:FF, the unit is in auto- discovery mode and will automatically determine the peer MAC address based on the PAA name (provided the PAA name is the same on both units).

    Allows the device to obtain routing information from the DHCP server.

    Port NameThe outgoing port used by this probe.
    Enable VLAN 1Check box to encapsulate Layer-2 PAA frames into a VLAN.
    VLAN 1 IDThe first VLAN ID.

    When enabled, Layer-2 PAA frames are encapsulated into the specified VLAN.

    EthertypeThe Ethertype of the first VLAN: C-VLAN, T-VLAN or S- VLAN.
    PriorityThe first VLAN's priority bits.

    Note: Only applies when VLAN 1 encapsulation is enabled.

    Enable VLAN 2Check box to encapsulate Layer-2 PAA frames into a VLAN-in-VLAN. VLAN2 represents the inner VLAN.

    Note: Only applies when VLAN 1 encapsulation is enabled.

    VLAN 2 IDThe second VLAN ID. When enabled, Layer-2 PAA frames are encapsulated into a second VLAN.

    Note: Only applies when VLAN 1 encapsulation is enabled.

    EthertypeThe second VLAN Ethertype: C-VLAN, T-VLAN or S- VLAN.

    Note: Only applies when VLAN 2 encapsulation is enabled.

    PriorityThe second VLAN's priority bits.

    Note: Only applies when VLAN 2 encapsulation is enabled.

    EVC Fault Propagation

    ParameterDescription
    EnableUse this PAA probe's status in fault propagation.

    The port configuration's Fault Propagation value must be Enabled and set to One-Way EVC mode for the fault to be propagated to the opposite port.

    Propagate On PortThe EVC client port to which the MEP status should be propagated.

    Note: This parameter is ignored if the port you select has not been set up to perform EVC fault propagation.

    UDP

    ParameterDescription
    Destination IPThe peer IPv4 Destination address.
    Source UDP PortThe source UDP port. The default value is 8793.
    Destination UDP PortThe destination UDP port. The default value is 8793.
    DSCPThe DSCP class selector. The expected length is 6 bits.
    ECNThe ECN value. You can associate an ECN value with the PAA packets, thereby simulating ECN in the customer network.

    The ECN bits are the last two bits of the IP ToS field.

    Range: 0-3

    VLAN 1 PriorityFirst VLAN priority bits. This can be used to associate a priority value for the first VLAN.

    Range: 0-7

    Continuity

    ParameterDescription
    Packet Loss Ref. PeriodThe reference period, expressed in seconds, for the continuity measurements.

    This value must be at least 10 times the value of the Sampling Period.

    Packet Loss ThresholdThe threshold, expressed as a percentage, at which an
    Excessive Packet Loss (EPL) alarm is triggered.
    Continuity Check ThresholdThe number of consecutive sampling periods without receiving any peer samples that must occur before declaring a Continuity Loss alarm.

    Minimum value: 4

    Maximum value: 50% of the total number of samples in the reference period.

    Default value: 4

    One-Way

    ParameterDescription
    Reference PeriodThe reference period, expressed in milliseconds, for one- way measurements.

    This value must be at least 10 times the value of the Sampling Period.

    Maximum DelayThe one-way delay allowed for each sample in the Reference Period.

    This value is used in conjunction with the Delay Threshold (samples) value to trigger the alarm PAA_OW_DELAY_ALERT.

    Delay ThreshThe number of consecutive samples exceeding the Maximum Delay that are allowed before declaring the one-way delay alarm for this Reference Period.
    Avg. Delay ThreshThe average one-way delay is calculated for the samples during the reference period. For example, for a reference period of 10 seconds, the average is calculated from samples taken during the last 10 seconds.

    Exceeding the threshold triggers the alarm PAA_OW_ AVG_DELAY_ALERT.

    Maximum Delay VariationThe maximum one-way delay variation threshold to monitor during a test period.

    This value is used in conjunction with the Delay Variation Threshold (samples) value to trigger the alarm PAA_OW_DV_ALERT.

    Delay Variation ThreshThe number of consecutive samples exceeding the Maximum Delay Variation that are allowed before triggering the one-way delay variation alarm for this Reference Period.
    Avg. Delay Variation ThreshThe average one-way delay variation is calculated for the samples during the reference period.

    Exceeding the threshold triggers the alarm PAA_OW_ AVG_DV_ALERT.

    Two-Way

    ParameterDescription
    Reference PeriodThe reference period, expressed in milliseconds, for two- way measurements.

    This value must be at least 10 times the value of the Sampling Period.

    Maximum DelayThe two-way delay allowed for each sample in the Reference Period.

    This value is used in conjunction with the Delay Threshold to trigger the alarm PAA_TW_DELAY_ ALERT.

    Delay ThreshThe number of consecutive samples exceeding the Maximum Delay that are allowed before triggering the two-way delay alarm for this Reference Period.
    Avg. Delay ThreshThe average two-way delay is calculated from samples during the reference period.

    Exceeding the threshold triggers the alarm PAA_TW_AVG_DELAY_ALERT.

    Maximum Delay VariationThe maximum two-way delay variation threshold to monitor during a test period.

    This value is used in conjunction with the Delay Variation Threshold to trigger the alarm PAA_TW_ DV_ALERT.

    Delay Variation ThreshThe number of consecutive samples exceeding the Maximum Delay Variation that are allowed before triggering the two-way delay variation alarm for this Reference Period.
    Avg. Delay Variation ThreshThe average two-way delay variation is calculated from samples during the reference period.

    Exceeding the threshold triggers the alarm PAA_TW_ AVG_DV_ALERT.

    IGMP

    ParameterDescription
    Reference PeriodThe reference period for IGMP measurements. This period must be a multiple of the One-Way Reference Period value.

    This parameter is valid only if the One-Way Join Period is not 0.

    Possible values, expressed in milliseconds:

    • 0 (default): No IGMP measurements
    • Minimum: One-way reference period x 10
    • Maximum: One-way reference period x 9000
    One-Way Join PeriodIf this parameter is not set to 0, IGMP join and leave delay measurements are performed for this period (during which one-way and packet loss samples are collected).

    This value should represent how long measurements are to be collected before issuing an IGMP Leave for each period.

    Possible values, expressed in milliseconds:

    • 0 (default): Constant, no join and leave measurements
    • Minimum: 10 x sampling period
    • Maximum: One-way reference period – (5 x sampling period)
    Max Join DelayThe maximum join delay objective. Possible values, expressed in milliseconds:
    • Minimum: 100 milliseconds
    • Maximum: One-way join period
    Join Delay ThreshThis value is the maximum number of consecutive join delay samples allowed, over and above the maximum join delay.

    Once this value is exceeded, the Join Delay Nbr Threshold value is incremented.

    Possible values, expressed in number of samples:

    • Minimum: 1
    • Maximum: (One-way join period) / (Sampling period)
    Join Average Delay ThreshThe maximum join average delay.

    Possible values, expressed in milliseconds:

    • Minimum: 100 milliseconds
    • Maximum: One-way join period
    Maximum Leave DelayThe maximum leave delay objective.

    Possible values, expressed in milliseconds:

    • 0 (default): No IGMP measurements
    • Minimum: 100 milliseconds
    • Maximum: (One-way reference period) – (One-way join period)
    Leave Delay ThreshThis value is the maximum number of consecutive leave delay samples allowed, over and above the maximum leave delay.

    Once this value is exceeded, the Leave Delay Nbr Threshold value is incremented.

    Possible values, expressed in number of samples:

    • Minimum: 1
    • Maximum: (One-way reference period – One-way join period)/(Sampling period)
    Leave Avg. Delay ThreshThe maximum leave average delay.

    Possible values, expressed in milliseconds:

    • Minimum: 100 milliseconds
    • Maximum: (One-way reference period) – (One-way join period)

    L2 VLAN 1 Validation

    ParameterDescription
    Tx/Rx VLAN 1 ID

    Rx VLAN 1 ID

    		Validate Tx/Rx VLAN 1 ID enables validating the transmitted VLAN 1 ID with the ID value that was received.

    If you expect a different received value, enter the value in the Rx VLAN 1 ID field.

    Range: 0-4,095

    Tx/Rx VLAN 1 Priority

    Rx VLAN 1 Priority

    		Validate Tx/Rx VLAN 1 priority enables validating the transmitted VLAN 1 priority with the priority that was received.

    If you expect a different received value, enter the value in the Rx VLAN 1 priority field.

    Range: 0-7

    L2 VLAN 2 Validation

    ParameterDescription
    Tx/Rx VLAN 2 ID

    Rx VLAN 2 ID

    		Validate Tx/Rx VLAN 2 ID enables validating the transmitted VLAN 2 ID with the ID that was received.

    If you expect a different received value, enter the value in the Rx VLAN 2 ID field.

    Range: 0-4,095

    Tx/Rx VLAN 2 Priority

    Rx VLAN 2 Priority

    		Validate Tx/Rx VLAN 2 priority enables validating the transmitted VLAN 2 priority with the priority that was received.

    If you expect a different received value, enter the value in the Rx VLAN 2 priority field.

    Range: 0–7

    UDP Validation

    ParameterDescription
    Tx/Rx DSCP

    Expected Rx DSCP

    		Validate Tx/Rx DSCP enables validating the transmitted DSCP value with the value that was received.

    If you expect a different received value, enter this value in the Expected RX DSCP field.

    Range: 0–63

    Tx/Rx VLAN 1 Priority

    Rx VLAN 1 Priority

    		Validate Tx/Rx VLAN 1 Priority enables validating the transmitted VLAN 1 priority with the priority that was received.

    If you expect a different received value, enter the value in the Rx VLAN 1 Priority field.

    Range: 0-7

    © 2024 Accedian Networks Inc. All rights reserved. Accedian®, Accedian Networks®,  the Accedian logo™, Skylight™, Skylight Interceptor™ and per-packet intel™, are trademarks or registered trademarks of Accedian Networks Inc. To view a list of Accedian trademarks visit: http://accedian.com/legal/trademarks/. 

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